Anal cancer occurs at the opening end of the gastrointestinal tract, which is called anus, from where stool is passed. It is not a common type of cancer, and it develops at the lining of the anal canal. It is mainly related to HPV infection and other factors. Its severity depends on its location, size, and stage. It is found that this uncommon type of cancer affects one individual in ... https://healthcheckbox.com/cancer/anal-cancer/